Changchun in the heart of the Songliao Plain in Northeast China's, a vast flat extension of land with elevations ranging from 250 to 350 meters at the transitional belt between the humid eastern mountains and the semi-arid western plains, has a semi-humid temperate continental monsoon climate. Its characteristics are: four distinct seasons, short, dry and windy springs; warm and rainy summers with few days of extreme high temperature; cool autumn with large temperature difference between day and night; and long cold winters. For five months of the year, the mean temperature is below 0 C. In spring, temperature recovers slowly: the monthly mean temperature does not rise above 0 C until April. Spring is the also season strong winds visit most frequently. The warm weather and green shades in summer have earned it the fame of "Spring City of North Borders". In the warmest month of July, the mean temperature is only 23.1 C. The humid summer has rich precipitation: there is a 350-400 mm precipitation from June to August, over 60 percent of the yearly total. With a weaker wind force in autumn than in spring, it may remain sunny and warm for several consecutive days but day-night temperature varies greatly. The winter is lastingly cold: the mean temperature drops to -15.1 C in January when there is little precipitation, dry climate, sometimes blizzards or even snowstorms.

Pressure

monthly mean atmospheric pressure

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Pressure(hPa)

9951

9935

9899

9834

9803

9776

9770

9804

9857

9902

9933

9946

Pressure (hPa)

9951

9935

9899

9834

9803

9776

9770

9804

9857

9902

9933

9946

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.1 monthly mean pressure

Temperature

monthly mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Temp(oF)

4.8

12.7

28.4

46.2

59.5

69

73.5

70.8

59.7

44.6

25.8

10.7

Temp(oC)

-15.1

-10.7

-2

7.9

15.3

20.6

23.1

21.6

15.4

7

-3.4

-11.8

Temperature (oC|oF)

-15.1 oC 4.8 oF

-10.7 oC 12.7 oF

-2 oC 28.4 oF

7.9 oC 46.2 oF

15.3 oC 59.5 oF

20.6 oC 69 oF

23.1 oC 73.5 oF

21.6 oC 70.8 oF

15.4 oC 59.7 oF

7 oC 44.6 oF

-3.4 oC 25.8 oF

-11.8 oC 10.7 oF

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.2 monthly mean temperature

monthly extreme mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

-3.5

3.5

18.6

35.4

48.7

59.9

66.3

63.1

50.1

35.4

17.9

3.2

Min Temp (oC)

-19.7

-15.8

-7.4

1.9

9.3

15.5

19.1

17.3

10.1

1.9

-7.8

-16

Max Temp (oF)

14.7

23.1

38.6

57.3

70.5

78.9

81.6

79.5

70.3

55

35

20.1

Max Temp(oC)

-9.6

-4.9

3.7

14.1

21.4

26.1

27.6

26.4

21.3

12.8

1.7

-6.6

monthly extreme daily temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

-27.4

-18.6

-17.4

10

26.4

40.1

51.9

43.3

29.4

7.8

-12.5

-23.8

Min Temp (oC)

-33

-28.1

-27.4

-12.2

-3.1

4.5

11.1

6.3

-1.4

-13.4

-24.7

-31

Max Temp (oF)

40.2

58.1

67.1

82.9

95.3

96.2

94.1

93.7

87

82

69.2

53

Max Temp (oC)

4.6

14.5

19.5

28.3

35.2

35.7

34.5

34.3

30.6

27.8

20.7

11.7

Humidity

monthly mean hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity (%)

66

61

53

49

51

65

78

79

69

61

63

66

Hunidity (%)

66

61

53

49

51

65

78

79

69

61

63

66

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.3 monthly mean hunidity

monthly minimum daily hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity(%)

13

6

2

3

3

6

21

28

13

8

11

17

Precipitation

monthly mean precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

3.2

4.5

12.3

21.9

49.9

99.7

161.1

121.7

51.9

28.9

10.3

5

Days (Precipitation<0.1mm)

3.7

4.6

5.5

7.1

9.8

13.6

15.4

12.4

8.8

6.7

5.7

5.4

Days (Precipitation<10mm)

0

0

.2

.4

1.4

3

4.8

3.9

1.6

.7

.1

0

Days (Precipitation<25mm)

0

0

0

.1

.3

.9

1.6

1.3

.2

.2

0

0

Days (Precipitation<50mm)

0

0

0

0

0

.1

.5

.4

0

0

0

0

Precipitation (mm)

3.2

4.5

12.3

21.9

49.9

99.7

161.1

121.7

51.9

28.9

10.3

5

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.4 monthly mean precipitation

monthly maximum daily precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

7.5

8.9

-20

34.6

37

65.3

130.4

122

54.6

44.7

14.5

15.7

Wind

monthly mean wind speed

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed(m/s)

3.6

3.6

4.4

5.3

4.8

3.7

3.1

2.9

3.2

3.9

4.1

3.7

Wind Speed (m/s)

3.6

3.6

4.4

5.3

4.8

3.7

3.1

2.9

3.2

3.9

4.1

3.7

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean wind speed

monthly maximum daily
wind speed and direction

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed (m/s)

24

25.3

23

28.3

31

23.3

15.7

16.3

18.3

21.3

20.3

21

Sunshine

monthly mean sunshine duration

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Duration (hour)

188.5

195.3

239.2

241.3

261.2

247.6

220.3

235.2

234.8

214.3

174.6

164.3

Duration (hour)

188.5

195.3

239.2

241.3

261.2

247.6

220.3

235.2

234.8

214.3

174.6

164.3

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean sunshine duration

monthly sunshine percentage

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Percentage (%)

66

66

65

60

58

54

47

54

63

63

60

60

Remarks:
Weather forecast is provided by China Meteorological Administration.
Climate information is based on monthly averages for 30-year period of 1971-2000.
Precipitation includes both rain and snow.